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Prevent EXTI handler from crashing when EXTI lines 16-32 are used.

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Refer to "EXTI Event Input mapping" table in MCU reference manuals.
This commit is contained in:
Dominic Clifton 2019-12-24 21:05:02 +01:00
parent 4c58889915
commit 38ffacf80e
1 changed files with 3 additions and 1 deletions
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4
src/main/drivers/exti.c
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@ -229,9 +229,11 @@ void EXTIEnable(IO_t io, bool enable)
#endif
}
#define EXTI_EVENT_MASK 0xFFFF // first 16 bits only, see also definition of extiChannelRecs.
void EXTI_IRQHandler(void)
{
uint32_t exti_active = EXTI_REG_IMR & EXTI_REG_PR;
uint32_t exti_active = (EXTI_REG_IMR & EXTI_REG_PR) & EXTI_EVENT_MASK;
while (exti_active) {
unsigned idx = 31 - __builtin_clz(exti_active);